Concrete mixer



April '20, 1926. 15811587 O. G. MANDT CONCRETE MIXER Filed Oct. s, 1925 2 ShetS-Sheet 1 WITNESSES INVENTOR Z 0 G- Mandt, L i 8W [(f f ATTORNEYS o. G'. MANDT CONCRETE MIXER Filed 001;. a 1925 N H K W..- Q W \N A N a l N N N A ril 20 1926'.

INVENTOR 0. G. fil ndt,

ATTORNEYS WITNESSES Patented Apr. 20, 1926.

airs-e srAr-rss OBEE'I GISERD MANDT, OF .KEOKU'K, IOWA, ASSIGNOR TO THE --AMERICAN CEMENT PA T EzN OFF MACHINE CO., OF KEOKUK, :IOWA, A.CORPORATIO N OF :IOWA.

oononn'rn MIXER.

Application filed October 8, 1925. Serial 'No. 61,303.

To all whom it may concern:

Beit known that I, OBERT G. MANDT, a citizen of the United States, residing at Keolzuk, in the county of Lee and'State-of Iowa, have invented certainnew and useful In'iprovemen'ts in'Concrete Mixers, of which the following is a specification.

This inventionrelates in general to concrete mixers and more particularly to an improvement in the discharge mechanism employed in conjunctionwith'the-mixer for discharging the concrete from the mixing drum of the mixer-into a 'WhQGlbMIOW or other receiver.

The object ofthe inve-ntionisto provide a machine of this character wherein the discharge mechanism is readily and easily controllable in such 1nanner=that-the discharge chute or spoon may be positioned to receive the concrete fromthe drum and convey it to the wheelbarrow or-receiver or maybe positioned in anidle and inactive'pesition and relation with respect to the mixing drum. The discharge chute orspoon is not only shiftable or swing-ableto operative or inoperative position but is releasably secured in either ofits two positions.

A' further object resides intheprovision of a novel form of operating or control means for the discharge chute or spoon which greatly facilitates the shifting or swinging of the discharge'chute or spoon and yet insuresthe retention of thesame in adjusted position. One of thea-dvantages of the control or operatin-gmechanism is that it is operable from either side ,of the machine.

A still further object resides in theprovision of a discharge mechanism for concrete n'iixers-which is of simple and durable construction reliable and eitective in opera tion and easy and comparatively inexpensive to manufacture.

The present invention consists inthe provision in a concrete mixer-having a rotary mixing drum provided with a discharge opening of a discharge chute or spoon mounted by means of a pair of arms'on-a swingable shaft extending transversely and above the discharge opening of the mixing drum, the shaft being rotatable inbearings provided on the frame of the machine .so that the discharge chute or spoon may "be swung into the discharge opening in the drum in an inclined discharging position and co-operable with-the shaft on which the spoon or chute is mounted for swing ing movement. Thiscontrol means may consist of-a crank arm fixed to the shaft-and having a laterally projecting stud, the latter engaging n mthree-wayslot-formed in an operating lever having an adjustable mounting on the frame co-operable fromeither side of-the frame.

Other objects and advantages reside in certain novel features-of 'thc construction,

arrangement and combination of partswhich will be hereinafter more fully described and particularly pointed out in the appended claims, reference-being had to the acco1npanying drawings forming a part of this specification, andin 4 which Figure 1 1s a View in side elevation illustrating one embodiment of the lnvention applied to a concrete mixer,

{Figure 2 is a fragmentary view in eleva-{ tion looliing toward tlleright of Figure 1, and showing the discharge chute or spoon in id-leorinaetive position, the control mocha nism being correspondingly positioned,

Figure 3 is a view similar to Figure Qbut' illustrating-thedischarge spoon or chutein positionto discharge the concrete from the mixing drum, and

Figure dis a detail-view onthe line l--l of Figure 2. Y

,Referringto the drawings, the numeral 1 designates generally a concrete mixer which maybe of any standard or conventional type and which has a-frame '2 on which arota-ry mixing 'drum'is mounted and driven in'the conventional manner. The rotary mixing drum has a discharge opening 4 and'internally has the usual vanes or-blades which cascade the mixture and produce atherough admixture of the ingredients of the concrete.

The present invention proposesthe provision of a. discharge spoon or chute, designated generally at 10, and comprising atapered trough-shaped body on which mounting pieces 11 are integrally formed or suit ably connected. The mounting pieces 11 are fastened in any suitable way to carrying arms 12 which are curved as .shown in Fig. 2, and which have sleeve members 13 fitted on a shaft 14 and suitably secured thereto. The shaft 14 is rotatably mounted in bearings 15 provided therefor on standards 16 supported on the frame of the machine. V hen the shaft is rotated in one direction that is, ina counterclockwise direction, a viewed in Fi s 2 and 3, the discharge chute or spoon 10 will be swung from the position shown in Figure 2 to the position shown in Figure 3. Tn Fiigfl the discharge chute or spoon 10 extends through the discharge opening 4 of the mining drum up into the interior of the drum where it receives the concrete as it falls from the mixing blades or vanes. The concrete falling into the chute or spoon l0 slides down the spoon or chute due to its inclination and falls into a wl'ieelbarrow or other receiver positioned to receive the same.

When the discharge spoon or chute 10 is positioned as shown in 2 it is idle or inactive since it is located out of the field of the concrete that falls from the .mixing blades of the drum and is inclined to dis charge back into the drum any concrete that may possibly be deposited in the chute or spoon.

Control mechanism is provided for swinging the chute or spoon and for holding the same in adjusted position. This control mechanism includes a crank arm 20 fixed to the shaft 13 adjacent one end of the same. The outer end of the crank arm is provided with a' laterally extending stud 21. As shown in Fig. 4, the stud 21 preferably has threaded connection, as at 22, with the outer end of the crank arm 20. The stud 21 also has a head 23 and a smooth bearing portion 2ft. The smooth bearing portion 24: of the stud is slidably and rotatably fitted in a three-way or T-shaped slot 25 provided in an operating lever 26. The T-shaped slot 25 has a lengthwise portion 27 and lateralportions 28 which extend on both sides of the lengthwise portion at one end of the same. The operating lever 26 is fulcruined, as at 30, on a bracket 31 secured in any one of the number of possible vertical adjustments on a supporting member 32 by means of fastening devices or bolts 33 co-operable with bolt holes in the bracket 31 and with slots in the supportingmember 32. The fastening devices 33 may be either bolts threadedly connected to the bracket 31 having heads engageable with the supporting member 32 or they may be bolts and nuts, the bolts extending through slots 1n the supporting member 32 and having their heads clamped against the supporting member by means of nuts threaded thereon. The operatine lever 26 1s provided with a handle memo-er ft whereby it. may be conveniently shifted or swung to swing and properly p0 sition the discharge chute or spoon to carry out the intended phase of the operation. In addition to the handle means is provided for shifting or swingingthe operating lever 26 from the opposite side of'the machine from that In which the handle 30 is located and this means includes a lateral lug 4:1 111- tegral with or suitably secured to the operating "lever andpivotally""connected"""' to one end of a control rod 12 extending to the opposite side Of the machine and gl'iided and supportel in suitable guides or bearings. if desired, the rod 42 may be equipped with a hand grip or the like at the side of the machine from which it is controlled.

With this til'I"".1gl1}Il G when the parts are positioned as shown in Figure 2 thestud 21 is engaged at one end of one of the lateral portions23ofthe slot'25 and this holds the necessary to grab the handle 40 or the grip V of the control rod 42 and swing the operating lever 26 in a clockwise direction, :as viewed in Figs. 2 and 3 until. the operating lever 26 occupies the position illustrated in Figure 3, wherein the stud 28 is engaged with the other branch 28 of the slot 25 and the discharge chute or'spoon is held in discharging position. In moving from the po sition shown in Fig. 2 to the position shown in Fig. 3, the stud first moves out of one of the lateral slots 28 and then down and up in the lengthwise slot 27 and finally into the other lateral. slot 28. This operation is reversed during the movement of the discharge chute or spoon from tie discharging position shown in Fig. 3 back to the inactive position shown in Fig. 2.

I claim 1. A chute actuating means for mixers comprising means for mounting the chute for swinging movement whereby it is swin gable into co-operative position with respect to the drum and to inactive position relative thereto, means for holding the chute in either position and comprising a crank arm connected with the chute and partaking of movement corresponding to the movement of the chute, an operating lever having a tl1ree-way'slot, and a stud carried by the crank arm and operating in the three-way slot.

2. A chute actuating means for concrete mixers comprising a shaft, apa-ir of arms fixed to the shaft and carrying the chute, a

concrete crank arm fixed to the shaft, a stud carried by the arm, an operating lever having a plurality of slots co-operable with the stud, and means for moving the operating lever from either side of the machine.

3. A chute actuating means for concrete mixers comprising means for mounting the discharge chute for swinging movement, manually controllable means for shifting the discharge chute and holding it in adjusted position and comprising a crank arm connected to the axis of swing of the discharge chute, an operating lever having a slot arrangement therein, a stud connected to the crank arm and co -operable with the slot arrangement of the operating lever, means for moving the operating lever from either side of the machine and including a rod extending from the side of the machine on which the lever is located to the other side of the machine, said lever having a laterally extending lug, said rod being pivotally connected to said lug.

4. A chute actuating means for concrete mixers comprising a shaft adapted to carry the chute, a crank arm fixed to the shaft and having a laterally extending stud at its outer end, an operating lever, an adjustable bracket on which the operating lever is fulcrumed, said operating lever having a longitudinal slot, lateral slots connecting with one end of the longitudinal slot, the stud of the crank arm being operatively fitted in said slots, and means for moving the operating lever.

5. A' chute actuating means for concrete mixers comprising a shaft adapted to carry the chute, a crank arm fixed to the shaft and having a laterally extending stud at its outer end, and an operating lever, said operating lever having a longitudinal slot, lateral slots connected with one end of the longtudinal slot, the stud of the crank arm being operatively fitted in said slots.

6. A chute actuating means for concrete mixers comprising means for mounting the discharge chute for the swinging movement whereby it is swingable into co-operative position with respect to the drum and to inactive position relative thereto, means for holding the chute in either position and comprising a crank arm connected with the chute and partaking of movement corresponding to the movement of the chute, an operating lever having a T-shaped slot, and a stud carried by the crank arm and operating in the T-shaped slot.

OBERT GISERD MANDT. 

